Ray Dalio acquired 202 Thousand Quest Diagnostics shares worth $27.7 Million. That's 0.15% of their equity portfolio (109th largest holding). The first Quest Diagnostics trade was made in Q4 2006. Since then Ray Dalio bought shares 26 more times and sold shares on 30 occasions. The stake costed the investor $26.6 Million, netting the investor a gain of 4.3% so far.